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Python: Check if first digit/character in each element in a given list is same or not

Python List: Exercise - 204 with Solution

Write a Python program to check if first digit/character of each element in a given list is same or not.

Sample Solution:

Python Code:

def test(lst):
    result = all(str(x)[0] == str(lst[0])[0] for x in lst) 
    return result
nums = [1234, 122, 1984, 19372, 100]
print("\nOriginal list:")
print(nums)
print("Check if first digit in each element of the said given list is same or not!")
print(test(nums))
nums = [1234, 922, 1984, 19372, 100]
print("\nOriginal list:")
print(nums)
print("Check if first digit in each element of the said given list is same or not!")
print(test(nums))
nums = ['aabc', 'abc', 'ab', 'a']
print("\nOriginal list:")
print(nums)
print("Check if first character in each element of the said given list is same or not!")
print(test(nums))
nums = ['aabc', 'abc', 'ab', 'ha']
print("\nOriginal list:")
print(nums)
print("Check if first character in each element of the said given list is same or not!")
print(test(nums))

Sample Output: 

Original list:
[1234, 122, 1984, 19372, 100]
Check if first digit in each element of the said given list is same or not!
True

Original list:
[1234, 922, 1984, 19372, 100]
Check if first digit in each element of the said given list is same or not!
False

Original list:
['aabc', 'abc', 'ab', 'a']
Check if first character in each element of the said given list is same or not!
True

Original list:
['aabc', 'abc', 'ab', 'ha']
Check if first character in each element of the said given list is same or not!
False

Pictorial Presentation:

Python List: Check if first digit/character in each element in a given list is same or not.

Flowchart:

Flowchart: Check if first digit/character in each element in a given list is same or not.

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Python Code Editor:

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Previous: Write a Python program to join adjacent members of a given list.
Next: Write a Python program to find the indices of elements of a given list, greater than a specified value.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m